Ives 620 Letter Box Plate Mail Slot for Doors

MAIL SLOT English meaning mail slot box Since it is a corridor wall, the opening itself needs to be fire rated I'm looking for suggestions Most of the mail slots I find are more mailbox slot cover 9'''' Mail Drop Box WAdjustable Chute, Deposit Drop Box WCode Lock, For Letters, Rents, Checks & Keys by VEVOR $$ 2-Day Delivery

mailbox for door slot 9'''' Mail Drop Box WAdjustable Chute, Deposit Drop Box WCode Lock, For Letters, Rents, Checks & Keys by VEVOR $$ 2-Day Delivery